Montana Dams
2,990 dams tracked by the National Inventory of Dams
Total Dams
2,990
High Hazard
188
6.3%
Poor / Unsatisfactory
132
Average Age
74 yrs
Hazard Classification
High188 (6.3%)
Significant193 (6.5%)
Low2,606 (87.2%)
Condition Assessment
Satisfactory113 (3.8%)
Fair44 (1.5%)
Poor / Unsatisfactory132 (4.4%)
Not Rated2,701 (90.3%)
Federal
278
State
151
Local
84
Private
2,466
Tallest Dams
- Yankee Doodle Tailings Dam570 ft
- Hungry Horse Dam564 ft
- Libby Dam422 ft
- Noxon Rapids260 ft
- Fort Peck Dam256 ft
High Hazard Dams
- Yankee Doodle Tailings DamHigh
- Hungry Horse DamHigh
- Libby DamHigh
- Noxon RapidsHigh
- Fort Peck DamHigh
Poor Condition Dams
All Dams in Montana
Showing 1326–1350 of 2,990
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Little Boy Blue Carter County | 12 | 1919 | Low | Not Rated |
| Little Blue Dam Sanders County | 95 | 1954 | Low | Not Rated |
| Little Bitterroot Flathead County | 17 | 1917 | High | Not Available |
| Little Bear/Us #37 Dam Petroleum County | 17 | — | Low | Poor |
| Little Blaine County | 20 | 1930 | Low | Not Rated |
| Lisk Creek Dam McCone County | 33 | 1931 | Low | Not Rated |
| Lipton Toole County | 10 | 1977 | Low | Not Rated |
| Lion Lake Dam Flathead County | 22 | 1948 | High | Not Rated |
| Lindstrom Fallon County | 16 | 1952 | Low | Not Rated |
| Lindquest #1 Daniels County | 21 | 1960 | Low | Not Rated |
| Linde Richland County | 28 | 1949 | Significant | Not Rated |
| Lindberg Sheridan County | 14 | 1965 | Low | Not Rated |
| Limpke #2 Fergus County | 36 | 1932 | Low | Not Rated |
| Liming Reservoir Big Horn County | 19 | 1960 | Low | Not Rated |
| Lima Beaverhead County | 56 | 1934 | High | Satisfactory |
| Libra Hill County | 20 | 1920 | Low | Not Rated |
| Libby Dam Lincoln County | 422 | 1973 | High | Not Available |
| Libbey'S Label Lincoln County | 8 | 1945 | Low | Not Rated |
| L Galt #7 Rosebud County | 20 | 1960 | Low | Not Rated |
| L Galt #3 Rosebud County | 20 | 1960 | Low | Not Rated |
| L Galt #25 Garfield County | 20 | 1960 | Low | Not Rated |
| L Galt #24 Garfield County | 25 | 1950 | Low | Not Rated |
| L Galt #20 Rosebud County | 18 | 1954 | Low | Not Rated |
| L Galt #1 Dam Rosebud County | 24 | — | Low | Unsatisfactory |
| L Galt #19 Rosebud County | 20 | 1944 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.